In terms of price and performance.
I'm looking at either of these sizes. 195/55R15, 195/50R15. i think 205/50R15 also can but need to check my rim width. currently using 185/60R15 but they look skinny for the rim. can live with some speedometer error, no worries
using it for daily driving where comfort is NOT a concern. just grip. but won't be going to the track (though these are supposedly good track tires)
i have tried the RS-2 before, but i think the price is a bit steep. currently using crap tires so i shd start looking. 2006 michelin van tires